[PATCH 1/9] discover_git_directory(): avoid setting invalid git_dir

[Johannes Schindelin <johannes.schindelin@gmx.de>]

When discovering a .git/ directory, we take pains to ensure that its
repository format version matches Git's expectations, and we return NULL
otherwise.

However, we still appended the invalid path to the strbuf passed as
argument.

Let's just reset the strbuf to the state before we appended the .git/
directory that was eventually rejected.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 setup.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/setup.c b/setup.c
index e3f7699a902..2435186e448 100644
--- a/setup.c
+++ b/setup.c
@@ -982,6 +982,7 @@ const char *discover_git_directory(struct strbuf *gitdir)
 		warning("ignoring git dir '%s': %s",
 			gitdir->buf + gitdir_offset, err.buf);
 		strbuf_release(&err);
+		strbuf_setlen(gitdir, gitdir_offset);
 		return NULL;
 	}
 
-- 
2.13.0.windows.1.460.g13f583bedb5